JPH07239683A - Amplifier device having musical instrument built in - Google Patents

Abstract

PURPOSE:To obtain an amplifier device having an electronic musical instrument built in capable of making performance of programs and automatic accompaniment with the device along by providing the device with an electronic musical instrument means for generating musical tone signals in accordance with digital performance information and a mixing means for mixing the output signal of the electronic musical instrument means with the signals inputted from an analog input terminal. CONSTITUTION:A CPU 1 executes the control over the entire part of the electronic musical instrument, such as key assignment and sound production control. An automatic performance data memory 4 stores a plurality of automatic performance data, such as MIDI files. The conventional performance by using a preamplifier 15 and a power amplifier 13 is possible in the case of ordinary musical instrument performance. A user inserts a ROM card in which the performance information of the programs is stored, into a card reader 8, selects the desired program from a panel and has the program automatically performed if the user desires to perform the musical instrument while sounding the program. The execution of the performance of the musical instrument so as to meet the automatic performance is possible as well. Ensemble of a guitar and a keyboard is possible if the MIDI keyboard is connected to the MIDI interface 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amplifier device for a guitar, for example, and more particularly to an amplifier device incorporating an electronic musical instrument device.

[0002]

2. Description of the Related Art Conventionally, there have been amplifier devices for generating musical tones for electric musical instruments such as guitars and basses, but these amplifier devices are provided with an effect adding circuit such as tone quality adjustment and distortion. Basically, it only had a function of amplifying an input signal and outputting it from a speaker.

[0003]

In the conventional amplifier device as described above, for example, in order to practice while playing the actual music, a tape deck, a CD deck, or the like is connected to the outside, or it is completely independent. However, there is a problem in that it is necessary to play music by using an audio device such as a stereo. There is also a problem that an automatic accompaniment device needs to be added to the outside even when an automatic accompaniment such as a rhythm instrument is attached. SUMMARY OF THE INVENTION It is an object of the present invention to provide an amplifier device with a built-in electronic musical instrument, which is capable of improving the problems of the prior art as described above and capable of playing music and automatically accompaniment by the device alone.

[0004]

According to the present invention, in an amplifier device having an analog input terminal, an electronic musical instrument means for generating a musical tone signal based on digital performance information and an output signal of the electronic musical instrument means are inputted from an analog input terminal. And a mixing means for mixing with the generated signal.

[0005]

By the means as described above, the present invention enables not only the performance of a normal musical instrument but also the accompaniment of a drum, a bass or the like, and further the accompaniment of a full band orchestra, only by the amplifier device of the present invention. . Furthermore, it can be used as an electronic musical instrument by connecting a BGM device or a keyboard to the outside.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a hardware configuration of a guitar amplifier device incorporating an electronic musical instrument to which the present invention is applied. The CPU 1 controls the entire electronic musical instrument such as key assignment and sound generation control. It also has a timer interrupt circuit. The ROM 2 stores a control program, tone color data, and the like. The RAM 3 stores panel setting information such as tone color parameters, various control data in the musical instrument, or inputted automatic performance data. The automatic performance data memory 4 is a ROM that stores a plurality of automatic performance data such as MIDI files. MID
The I interface circuit 5 transmits / receives a MIDI signal to / from an external MIDI device.

The panel 6 includes a selection switch for automatic performance,
A tone color setting switch, a volume or tempo setting volume operation switch, a volume and a display such as a liquid crystal or LED. The panel interface 7 is a circuit for scanning the panel switch and the like under the control of the CPU 1 and a drive circuit for the display. Consists of. The card reader 8 is a device for reading a card type information storage medium such as a ROM card, a RAM card, an IC card, a magnetic card, and the card interface 9 is a card reader 8.
And the bus 17 are connected.

The tone generator circuit 10 is a circuit for reading out waveform information from a waveform memory 11 in which waveforms are stored in advance, at address intervals corresponding to the pitch of the input performance information, and generating a digital tone signal. D / A converter 12
Converts the digital musical tone signal into D / A. Power amplifier 1
3 is a D / A converter 12 for driving the speaker 14.
The musical sound signal output from the preamplifier 15 and the output signal of the preamplifier 15 are mixed and amplified. The preamplifier 15, which will be described in detail later, amplifies a signal input from a musical instrument such as a guitar, and changes the tone color and adds effects. The A / D converter 16 is for A / D converting the output signal of the preamplifier and fetching it, and the output signal is read by the CPU 1 or transferred to the tone generator circuit 10 at every predetermined sampling cycle. The bus 17 connects each circuit in the electronic musical instrument.

FIG. 2 is a block diagram showing details of an example of the preamplifier 15 shown in FIG. Since such an amplifier circuit is well known, its outline will be described. The block 20 is a circuit for adjusting the gain of the input signal, and when the gain is increased by this circuit, the waveform is distorted by the two diodes of the distortion circuit of the block 22 and distortion is applied. Therefore, the sound quality of the distortion can be controlled by adjusting the volume of the gain I and the gain II. The equalizer circuit 21 independently adjusts the volume of each of the high-pitched sound portion (treble), the middle-pitched sound portion (middle), and the low-pitched sound portion (bass) by a well-known RC network. The presence circuit 23 corrects the sound quality by adjusting the level of a higher-pitched component than the treble. The master volume unit 24 controls the overall gain with a variable gain amplifier. This output is also input to the A / D converter 16. The external effect circuit connection section 25 is provided with a jack for inserting an external effect circuit into the signal line. The output of the preamplifier 15 and the output of the D / A converter 12 are input to the main amplifier via a mixing circuit 26 using a resistor.

FIG. 3 is a flow chart showing the main processing of the CPU 1. When the power switch of the electronic musical instrument is turned on, in step S1, the CPU 1 initializes the contents of the control information area in the RAM 3 and the contents of the control register in the tone generator circuit 10. In step S2, the CPU 1 drives the panel interface 7 to scan the panel 6, and when detecting a state change, performs an event process corresponding to the change content. For example, when the tone color is changed, the corresponding parameter of the tone generator circuit is changed. Further, when the tempo setting volume is operated, the parameter for determining the tempo of the automatic performance in the RAM is changed based on the input volume position information.

In step S3, the CPU 1 checks whether or not the received MIDI information is present in the reception buffer, and if the information is present, the well-known tone generation processing such as key assignment and key-off processing is performed. The reception of the MIDI signal is processed by the interrupt and stored in the reception buffer in the RAM. In step S4, a well-known automatic performance process is performed. In the automatic performance processing, it is checked whether or not the automatic performance is set, and if it is set, based on the output of the tempo counter, which counts up at the cycle corresponding to the specified tempo, the automatic sounding timing is reached. The performance information is read out in order to control the pronunciation. The updating process of the tempo counter is executed during the timer interrupt process. In step S5, the panel display process, the parameter updating process of the tone generator circuit 10, the effect adding process, or the A
Processing such as processing of the signal taken in from the / D converter is performed.

Next, the operation will be described. In the case of a normal musical instrument performance, the same performance as the conventional performance can be performed by using the preamplifier 15 and the power amplifier 13. If you want to play an instrument while playing a song, for example, insert a ROM card in which performance information of the song is stored into a card reader, select the desired song from the panel, and play it automatically. It can be performed. M to MIDI terminal
If you connect an IDI keyboard, you can play guitar and keyboard together, and if you play drums and bass automatically, you can play a band. When the musical instrument is not used, it can be used as a BGM device or a karaoke device by utilizing the automatic performance function, and can also be used as an electronic piano or electronic organ by connecting a MIDI keyboard. As described above, by adding the electronic musical instrument device to the amplifier device, one device can be used for various uses including automatic accompaniment.

Next, a second embodiment will be described. In the second embodiment, the signal of the musical instrument is converted into a digital signal by the A / D converter 16 and the digital signal is used in the electronic musical instrument device. As a form of use, first, an automatic performance can be started by a signal of a musical instrument, or tempo information can be extracted from an input signal of a musical instrument and the tempo of the automatic performance can be matched with the performance of the musical instrument. Also, turn off the power when there is no input from the instrument for a certain period of time, or turn off mute as an aid to the performance when there is no input from the instrument for a certain period of time when muting only the melody part of the song and playing automatically. Mute can be turned on when there is input again. In addition, balance the volume of the instrument and the volume of the automatic performance, or adjust the pitch (pitch).
It is also possible to automatically transpose the automatic performance by detecting.

In the above-described usage form, the CPU 1 detects the parameters such as the level, timing and frequency of the signal from the musical instrument by the software and performs various processing according to the result, but the signal itself from the musical instrument is taken in. It is also possible to output the signal through the D / A converter 12 after the signal processing by the CPU 1 or the tone generator circuit 10. For example, instead of reading the waveform from the waveform memory 11, the designated tone generation channel of the tone generator circuit 10 takes in the waveform data from the A / D converter 16. With such a configuration, various effects can be added or tone colors can be corrected by digital signal processing. Therefore, the preamplifier 15 does not need various blocks as shown in FIG. All you have to do is amplify it to the required level. Therefore, it is possible to reduce the hardware. The electronic musical instrument unit may be provided with a DSP (digital signal processor) for digital signal processing.

Although the embodiment has been described above, the following modifications are also possible. You can also use the function of an electronic musical instrument to generate a sound for guitar tuning by pressing a switch on the panel. As means for supplying automatic performance information, in addition to a built-in ROM and a card-type storage device, a floppy disk, an optical disk drive such as a CDROM, and a communication port such as RS-232C may be provided.
A personal computer or sequencer connected to the MIDI terminal can also be used. It is also possible to connect a foot switch or the like via the panel to control the on / off of the accompaniment during the performance. The left and right channels of the output of the electronic musical instrument device may be provided, and the power amplifier and the speaker may be provided for the two channels. Since the signal level of the analog musical instrument can be controlled by the preamplifier 15 and the output signal of the electronic musical instrument section can be controlled by the volume of the panel, the power amplifier 13 showed an example of simply mixing the signals. An adjustable mixing circuit may be provided.
Further, a plurality of analog input terminals and preamplifiers may be provided. The power amplifier and the speaker may be external.

[0016]

As described above, according to the amplifier device with a built-in electronic musical instrument of the present invention, not only the performance of a normal musical instrument but also the accompaniment of a drum, a bass, etc., and a full band orchestra can be achieved by this device alone. It is also possible to perform with the accompaniment. Furthermore, by connecting a BGM device or a keyboard or the like to the outside, it can be used as an electronic musical instrument, and there is an effect that it can be used in a very wide variety of ways.

[Brief description of drawings]

FIG. 1 is a block diagram showing an amplifier device with a built-in electronic musical instrument according to the present invention.

FIG. 2 is a block diagram showing an example of a preamplifier circuit.

FIG. 3 is a flowchart showing a main process of CPU 1.

[Explanation of symbols]

1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Automatic performance data memory, 5 ... MIDI interface, 6 ... Panel, 7 ... Panel interface, 8 ... Card reader,
9 ... Card interface, 10 ... Sound source circuit, 11 ...
Waveform memory, 12 ... D / A converter, 13 ... Power amplifier, 14 ... Speaker, 15 ... Preamplifier, 16 ... A / D
Converter, 17 ... Bus

Claims (3)

[Claims] 1. An amplifier device having an analog input terminal, wherein electronic musical instrument means for generating a musical tone signal based on digital performance information and mixing means for mixing an output signal of the electronic musical instrument means with a signal inputted from an analog input terminal. An amplifier device with a built-in electronic musical instrument, comprising: 2. The electronic musical instrument built-in amplifier device according to claim 1, wherein the electronic musical instrument means comprises a digital musical performance information storage means and an automatic musical performance means for automatically performing musical performance based on the musical performance information. . 3. The electronic musical instrument means comprises means for A / D converting a signal input from an analog input terminal, and means for processing a digital signal of the A / D converted signal. An amplifier device with a built-in electronic musical instrument according to any one of claims 1 and 2.